Chelsey Colleen Kahanowitch, D.O.
Family Medicine Physician · Westlake Village, CA
Chelsey Colleen Kahanowitch, D.O. is a family medicine physician with a practice address in Westlake Village, California, and NPI 1750743530, issued on Mar 22, 2016. Check the license (California 20A15970, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Chelsey Colleen Kahanowitch
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A15970 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2239 Townsgate RD Ste 208, Westlake Village, CA 91361
- Phone
- (805) 601-5051
- Enumerated
- Mar 22, 2016
- Record last updated
- May 5, 2025
- Fax
- (805) 790-9303
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Verify Chelsey Colleen Kahanowitch in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A15970Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% fewer Medicare Part D claims than the average family medicine physician in 2024
1,977 Medicare Part D claims for 246 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 24 claims were for opioids.
Most prescribed
- Levothyroxine Sodium155 claims
- Atorvastatin Calcium120 claims
- Omeprazole88 claims
- Losartan Potassium66 claims
- Amlodipine Besylate56 claims
- Synthroid54 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 97.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Chelsey Colleen Kahanowitch among 17,133 family medicine physician records in California
Chelsey Colleen Kahanowitch, D.O. is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 76% of them.
- NPI issued2016 · 76% of these records are older, 21% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2025 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
19 family medicine physician records list a practice address in Westlake Village
They are 19 of the 1,397 NPPES records with a practice address in Westlake Village, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Westlake Village → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Irina Feldman, M.D.Thousand Oaks, CA 913611417919721
- Alicia Guevara, M.D.Thousand Oaks, CA 913611629295217
- David Gunn, MDWestlake Village, CA 913611215163035
- Bader Iqbal, M.D.Thousand Oaks, CA 913611346254364
- Razmig Krumian, D.O.Westlake Village, CA 913611720064462
- Darrick Lee, D.O.Westlake Village, CA 913611811424682
- Amy Lin, M.D.Westlake Village, CA 913611770511081
- Mike Oulashian, M.D.Thousand Oaks, CA 913611164694212
Common questions
What is Chelsey Colleen Kahanowitch, D.O.'s NPI number?
Chelsey Colleen Kahanowitch, D.O.'s National Provider Identifier (NPI) is 1750743530, issued on Mar 22, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Chelsey Colleen Kahanowitch, D.O. located?
The NPPES record lists a practice address at 2239 Townsgate RD Ste 208, Westlake Village, CA, 91361. Phone: (805) 601-5051. Providers update this record themselves, so call before visiting.
How can I verify Chelsey Colleen Kahanowitch, D.O.'s license?
NPPES lists California license number 20A15970, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Chelsey Colleen Kahanowitch, D.O. prescribe under Medicare Part D?
In 2024, Chelsey Colleen Kahanowitch, D.O. had 1,977 Medicare Part D claims for 246 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Chelsey Colleen Kahanowitch, D.O.'s MIPS final score?
The 2023 MIPS final score is 97.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.